Đề thi thử số 20 — Reading 40 câu (có bài đọc)

The development of modern science is a story that spans millennia, cultures, and continents. While the formalized "scientific method" as we know it today is largely a product of European thought from the 17th century onward, the roots of scientific thinking stretch back to ancient civilizations around the world. Babylonian astronomers tracked planetary motions with remarkable accuracy thousands of years ago. Indian mathematicians developed the concept of zero and made advances in algebra, trigonometry, and calculus long before these ideas reached Europe. Chinese scholars made foundational contributions to fields ranging from seismology to pharmacology. Egyptian, Greek, Roman, Islamic, and Mesoamerican civilizations all contributed to the slow accumulation of knowledge that would eventually flower into modern science.

The transition from ancient and medieval knowledge to what we now call modern science was a gradual process that unfolded over several centuries in Europe, fueled by a complex interplay of intellectual, social, economic, and religious factors. The rediscovery of classical Greek texts—particularly those of Aristotle, Euclid, and Archimedes—during the Renaissance inspired European scholars to look to nature and reason rather than religious authority alone. The invention of the printing press in the mid-15th century made books more affordable and accessible, allowing ideas to spread more rapidly than ever before. The voyages of discovery opened European eyes to new lands, peoples, plants, and animals, challenging old assumptions and stimulating new questions about the natural world.

The Scientific Revolution of the 16th and 17th centuries marked a fundamental shift in how educated Europeans understood the universe and how they should investigate it. Figures like Nicolaus Copernicus, who proposed a heliocentric (sun-centered) model of the solar system; Galileo Galilei, who used the newly invented telescope to observe mountains on the Moon, moons orbiting Jupiter, and phases of Venus that supported the Copernican model; Johannes Kepler, who formulated the laws of planetary motion; and Isaac Newton, whose Principia Mathematica unified celestial and terrestrial mechanics under universal laws of gravitation and motion—all helped establish a new way of understanding the world based on observation, experimentation, and mathematical description.

Crucially, the Scientific Revolution was not just about discovering new facts about nature—it was about developing a new method of inquiry. Francis Bacon championed inductive reasoning, the process of drawing general conclusions from specific observations. René Descartes developed deductive reasoning and emphasized the importance of systematic doubt. These methodological innovations, combined with the development of instruments like the telescope, microscope, barometer, and air pump, allowed investigators to extend the range of human senses and gather evidence that was previously inaccessible. The institutional structures that supported this new science—universities, scientific societies like the Royal Society (founded in 1660) and the French Academy of Sciences (founded in 1666), and scientific journals—created a self-reinforcing system that propelled the rapid growth of scientific knowledge and established science as a distinct and authoritative way of understanding the natural world.

When Albert Einstein published his theory of special relativity in 1905, he was a 26-year-old patent clerk with no academic position. Within a few years, his work would revolutionize our understanding of space, time, energy, and matter, making him one of the most famous scientists in history. The story of Einstein's contributions illustrates both the power of individual genius and the collaborative nature of modern science, as his ideas built upon and were developed in dialogue with the work of many other physicists.

Einstein's special relativity, developed in 1905, introduced two postulates that seemed to contradict common sense but have been confirmed by countless experiments. First, the laws of physics are the same for all observers in uniform motion. Second, the speed of light in a vacuum is constant, regardless of the motion of the light source or the observer. From these seemingly simple postulates, Einstein derived remarkable consequences: time dilates (slows down) for objects in motion relative to an observer, lengths contract in the direction of motion, mass and energy are equivalent (expressed in the famous equation E=mc²), and nothing can travel faster than the speed of light.

Ten years later, Einstein published his theory of general relativity, which extended special relativity to include gravity. Where Isaac Newton had described gravity as a force pulling objects toward each other, Einstein proposed that gravity is actually the curvature of spacetime caused by mass and energy. Massive objects like stars and planets create "dips" in the fabric of spacetime, and other objects follow curved paths because of this curvature. General relativity has been tested numerous times and has passed every test, including the famous 2019 image of a black hole captured by the Event Horizon Telescope—predicted by general relativity long before the technology existed to observe it.

Beyond relativity, Einstein also made crucial contributions to quantum mechanics, the strange and counterintuitive theory that describes the behavior of matter and energy at the smallest scales. Ironically, Einstein himself was uncomfortable with some of quantum mechanics' implications, particularly the idea that particles can exist in multiple states simultaneously until observed. His famous quote "God does not play dice with the universe" reflected his belief that quantum mechanics must be incomplete. Despite his discomfort, his work on the photoelectric effect earned him the Nobel Prize in Physics in 1921 and laid the foundation for much of quantum theory. Modern physics, including quantum mechanics, general relativity, and ongoing efforts to unify them, continues to build on the foundations Einstein helped establish, seeking to understand the fundamental nature of reality from the smallest particles to the largest structures in the universe.

For most of recorded history, women have been systematically excluded from formal scientific education and professional scientific careers. Universities in Europe and America did not generally admit women until the late 19th or even 20th century, and even when admitted, women often faced discrimination, were denied positions, had their work attributed to male colleagues, or were simply written out of history. Despite these enormous obstacles, women have made contributions to science that have changed our understanding of the world—from the structure of DNA to the development of life-saving drugs to the discovery of pulsars.

One of the most famous examples of an overlooked female scientist is Rosalind Franklin, a British chemist and X-ray crystallographer whose work was central to the discovery of the structure of DNA. Her famous "Photo 51," an X-ray diffraction image of DNA taken in 1952, provided crucial evidence for DNA's double helix structure. However, her colleagues Maurice Wilkins and James Watson used this image without her knowledge or permission to inform their famous 1953 paper on DNA's structure. Watson, Crick, and Wilkins received the Nobel Prize in 1962 for this work; Franklin had died of ovarian cancer four years earlier at age 37 and could not be considered. Only in recent decades has Franklin's essential contribution received proper recognition.

Another pioneering woman in science was Marie Curie, who remains the only person to have won Nobel Prizes in two different scientific fields—Physics in 1903 (shared with her husband Pierre Curie and Henri Becquerel for their work on radioactivity) and Chemistry in 1911 (for her discovery of the elements radium and polonium). Despite facing intense sexism in the male-dominated scientific establishment of her time, Curie's brilliance and determination earned her worldwide recognition. She remains an inspiration to aspiring scientists, particularly women, around the world. Tragically, her long-term exposure to radioactive materials—which she often carried in her pockets—likely caused the aplastic anemia that killed her in 1934.

Other notable women scientists include Lise Meitner, the Austrian-Swedish physicist whose work on nuclear fission was overlooked when the Nobel Prize for the discovery was awarded to her male colleague Otto Hahn; Barbara McClintock, the American geneticist who discovered "jumping genes" (transposons) in maize, for which she received a solitary 1983 Nobel Prize, decades after her discovery; and Jane Goodall, whose patient observations of chimpanzees in the wild revolutionized our understanding of primate behavior and tool use. As the contributions of these and countless other women are increasingly recognized, the history of science is being rewritten to include the diverse voices and insights that have always been part of scientific progress, even when they were hidden, dismissed, or attributed to others.

The pace of scientific discovery continues to accelerate, driven by advances in computing power, big data, artificial intelligence, and global collaboration. Problems that once seemed impossible to solve are yielding to new tools and approaches, while entirely new fields of inquiry are opening up at the intersections of traditional disciplines. The 21st century is likely to be remembered as one of the most transformative periods in the history of science, with implications for nearly every aspect of human life and the planet we inhabit.

One of the most exciting frontiers is the convergence of biology and technology. Synthetic biology, the field that seeks to design and construct new biological parts and systems or to redesign existing ones, is enabling scientists to program living organisms much as we program computers. CRISPR gene-editing technology, which earned Jennifer Doudna and Emmanuelle Charpentier the 2020 Nobel Prize in Chemistry, has made it dramatically easier to edit DNA, with profound implications for medicine, agriculture, and our understanding of life itself. The ability to read, write, and edit genetic code is opening possibilities ranging from curing genetic diseases to engineering crops that can withstand climate change.

Artificial intelligence is accelerating scientific discovery across virtually every field. AI systems are now helping to design new drugs, predict protein structures (as demonstrated by DeepMind's AlphaFold, which has predicted the structures of hundreds of millions of proteins), analyze astronomical data, model complex climate systems, and generate hypotheses that human researchers can then test. The combination of AI with high-throughput experimentation and big data is creating a new paradigm of discovery that would have been unimaginable just a few decades ago. This raises profound questions about the future role of human scientists in a world where AI can make many discoveries faster than humans can alone.

Equally important are the ethical, social, and philosophical questions that scientific advances raise. As our power to manipulate the natural world increases—with tools like CRISPR, AI, and advanced materials—so too does our responsibility to use that power wisely. The history of science includes cautionary tales of discoveries used for harm as well as good, from nuclear energy to social media algorithms. Building a future in which scientific advances serve humanity requires not just technical excellence but also thoughtful engagement with the values, institutions, and governance structures that shape how science is conducted and applied. The challenges ahead—climate change, pandemic preparedness, sustainable development, and more—will require both scientific ingenuity and the wisdom to use knowledge for the common good.